From publisher blurb: Liber Sanguinis is a player-focused supplement that was developed along with the Fanged Fables kickstarter. Liber Sanguinus contains vampire and undead themed character options that can be used to provide vampiric flavor to any character class. Each of the 12 base classes have new character subclasses made that follow a vampiric or undead theme. Several new vampiric themed spells. A few vampiric magic items. 3 vampire themed character backgrounds.